Unofficial news and tips about Google

December 4, 2009

Google DNS

Google launched a DNS resolving service called Google Public DNS that uses Google's infrastructure to improve page loading time. A DNS resolver converts domain names into IP addresses and this process might slow down browsing.

"As the web continues to grow, greater load is placed on existing DNS infrastructure. Since Google's search engine already crawls the web on a daily basis and in the process resolves and caches DNS information, we wanted to leverage our technology to experiment with new ways of addressing some of the existing DNS challenges around performance and security."

An important problem is that DNS resolvers can track all the web pages sites you visit and build a profile of your interests. Google's privacy page says that the full IP addresses are deleted within 48 hours and Google does not permanently store personally identifiable information. "We built Google Public DNS to make the web faster and to retain as little information about usage as we could, while still being able to detect and fix problems."

OpenDNS, a popular third-party DNS resolving service, offers more feature than Google Public DNS: web content filtering, stats, typo correction, shortcuts, but they're available if you create an account and enter personal information like your name and address. When you type an invalid URL, OpenDNS redirects you to its own search engine to show suggestions and ads. Other free DNS resolution services: Comodo Secure DNS, OpenNIC, DNS Advantage.

You can test all the services and decide which one works best for you by using GRC's Domain Name Speed Benchmark. Don't forget to add Google's memorable IPs: 8.8.8.8 and 8.8.4.4.